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<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="the_type_traits_introspection_library.tti_history"></a><a class="link" href="tti_history.html" title="History">History</a>
</h2></div></div></div>
<h4>
<a name="the_type_traits_introspection_library.tti_history.h0"></a>
      <span class="phrase"><a name="the_type_traits_introspection_library.tti_history.boost_1_73"></a></span><a class="link" href="tti_history.html#the_type_traits_introspection_library.tti_history.boost_1_73">Boost
      1.73</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          The enclosing type to be introspected can now also be a union
        </li>
<li class="listitem">
          You can introspect for the specific nested types of class/struct, enumeration,
          or union
        </li>
<li class="listitem">
          You can introspect for the nested type of function templates using function
          template instantiation
        </li>
</ul></div>
<h4>
<a name="the_type_traits_introspection_library.tti_history.h1"></a>
      <span class="phrase"><a name="the_type_traits_introspection_library.tti_history.post_boost_1_55_development"></a></span><a class="link" href="tti_history.html#the_type_traits_introspection_library.tti_history.post_boost_1_55_development">Post
      Boost 1.55 development</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          Passing a valid non-class as the enclosing type of the query macro metafunctions
          always returns false, rather than producing a compiler error.
        </li>
<li class="listitem">
          Passing a valid non-class as the enclosing type of the BOOST_TTI_MEM_TYPE
          macro metafunction always returns the marker type, rather than producing
          a compiler error.
        </li>
</ul></div>
<h4>
<a name="the_type_traits_introspection_library.tti_history.h2"></a>
      <span class="phrase"><a name="the_type_traits_introspection_library.tti_history.boost_1_54"></a></span><a class="link" href="tti_history.html#the_type_traits_introspection_library.tti_history.boost_1_54">Boost
      1.54</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          TTI is in Boost and the macros have been simplified
        </li>
<li class="listitem">
          Breaking changes
          <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                The nullary type metafunctions are no longer part of the library.
              </li>
<li class="listitem">
                Single common macro metafunctions are now used for introspecting
                member data, member functions, static member data, static member
                functions, data, functions, types, and templates.
              </li>
<li class="listitem">
                Composite forms of macro metafunctions are now folded into the main
                macros.
              </li>
<li class="listitem">
                BOOST_TTI_HAS_TYPE metafunction takes an optional second template
                parameter which may be an MPL lambda expression.
              </li>
<li class="listitem">
                The BOOST_TTI_MEMBER_TYPE metafunction takes an optional marker type.
              </li>
</ul></div>
        </li>
</ul></div>
<h4>
<a name="the_type_traits_introspection_library.tti_history.h3"></a>
      <span class="phrase"><a name="the_type_traits_introspection_library.tti_history.version_1_5"></a></span><a class="link" href="tti_history.html#the_type_traits_introspection_library.tti_history.version_1_5">Version
      1.5</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          The TTI has been accepted into Boost. This is the first iteration of changes
          as the library is being prepared for Boost based on the library review
          and end-user comments and suggestions. For each iteration of changes made
          based on end-user comments and suggestions, I will produce a new version
          number so that end-users who want to follow the progress of the library
          for Boost can know what is being changed. I will be targeting Boost 1.49
          for completing all changes and passing all tests in order to have TTI ready
          to be copied from Boost trunk to Boost release for inclusion into Boost.
        </li>
<li class="listitem">
          Breaking changes
          <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                Macro metafunctions are no longer generated in any namespace, but
                directly in the scope of the end-user.
              </li>
<li class="listitem">
                The metafunction class generating macros, for each metafunction macro,
                have been removed. The end-user can use boost::mpl::quote instead
                if he wishes.
              </li>
<li class="listitem">
                The metafunction name generating macros have been simplified so that
                no namespace name is generated, and for each macro of the macro metafunctions
                there is a single metafunction name generating macro.
              </li>
<li class="listitem">
                The BOOST_TTI_TRAITS_GEN macro has been removed.
              </li>
<li class="listitem">
                Individual header file names have changed to more closely reflect
                the metafunction macro names.
              </li>
<li class="listitem">
                The names of the composite member function and composite static member
                function macros have changed from BOOST_TTI_HAS_COMP_MEMBER_FUNCTION
                to BOOST_TTI_HAS_MEMBER_FUNCTION_WITH_SIG and from BOOST_TTI_HAS_COMP_STATIC_MEMBER_FUNCTION
                to BOOST_TTI_HAS_STATIC_MEMBER_FUNCTION_WITH_SIG.
              </li>
</ul></div>
        </li>
<li class="listitem">
          All template parameter names are now unique to TTI to avoid name clashes.
        </li>
<li class="listitem">
          Nullary type metafunctions can be passed non-class types as is.
        </li>
</ul></div>
<h4>
<a name="the_type_traits_introspection_library.tti_history.h4"></a>
      <span class="phrase"><a name="the_type_traits_introspection_library.tti_history.version_1_4"></a></span><a class="link" href="tti_history.html#the_type_traits_introspection_library.tti_history.version_1_4">Version
      1.4</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          Breaking changes
          <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_MEMBER</span></code>
                (<code class="computeroutput"><span class="identifier">BOOST_TTI_TRAIT_HAS_MEMBER</span></code>)
                has been changed to <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_COMP_MEMBER_FUNCTION</span></code>
                (<code class="computeroutput"><span class="identifier">BOOST_TTI_TRAIT_HAS_COMP_MEMBER_FUNCTION</span></code>)
                and <code class="computeroutput"><span class="identifier">BOOST_TTI_MTFC_HAS_MEMBER</span></code>
                (<code class="computeroutput"><span class="identifier">BOOST_TTI_MTFC_TRAIT_HAS_MEMBER</span></code>)
                has been changed to <code class="computeroutput"><span class="identifier">BOOST_TTI_MTFC_HAS_COMP_MEMBER_FUNCTION</span></code>
                (<code class="computeroutput"><span class="identifier">BOOST_TTI_MTFC_TRAIT_HAS_COMP_MEMBER_FUNCTION</span></code>).
                This family of functionality now supports only member functions with
                composite syntax.
              </li>
<li class="listitem">
                <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_STATIC_MEMBER</span></code>
                (<code class="computeroutput"><span class="identifier">BOOST_TTI_TRAIT_HAS_STATIC_MEMBER</span></code>)
                has been changed to <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_COMP_STATIC_MEMBER_FUNCTION</span></code>
                (<code class="computeroutput"><span class="identifier">BOOST_TTI_TRAIT_HAS_COMP_STATIC_MEMBER_FUNCTION</span></code>)
                and <code class="computeroutput"><span class="identifier">BOOST_TTI_MTFC_HAS_STATIC_MEMBER</span></code>
                (<code class="computeroutput"><span class="identifier">BOOST_TTI_MTFC_TRAIT_HAS_STATIC_MEMBER</span></code>)
                has been changed to <code class="computeroutput"><span class="identifier">BOOST_TTI_MTFC_HAS_COMP_STATIC_MEMBER_FUNCTION</span></code>
                (<code class="computeroutput"><span class="identifier">BOOST_TTI_MTFC_TRAIT_HAS_COMP_STATIC_MEMBER_FUNCTION</span></code>).
                This family of functionality now supports only static member functions
                with composite syntax.
              </li>
<li class="listitem">
                <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_has_static_data</span></code> has been changed
                to <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_has_static_member_data</span></code>.
              </li>
</ul></div>
        </li>
<li class="listitem">
          Added <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_STATIC_MEMBER_DATA</span></code>
          and family for introspecting static member data.
        </li>
<li class="listitem">
          Inclusion of specific header files for faster compilation is now supported.
        </li>
<li class="listitem">
          Inclusion of macro metafunction name generating macros.
        </li>
<li class="listitem">
          Shorten the names of the test files and test header files.
        </li>
<li class="listitem">
          Added documentation topic about introspecting function templates.
        </li>
</ul></div>
<h4>
<a name="the_type_traits_introspection_library.tti_history.h5"></a>
      <span class="phrase"><a name="the_type_traits_introspection_library.tti_history.version_1_3"></a></span><a class="link" href="tti_history.html#the_type_traits_introspection_library.tti_history.version_1_3">Version
      1.3</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
          Breaking changes
          <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                The names of the main header files are shortened to 'boost/tti/tti.hpp'
                and 'boost/tti/tti_vm.hpp'.
              </li>
<li class="listitem">
                The library follows the Boost conventions.
                <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: square; ">
<li class="listitem">
                      Changed the filenames to lower case and underscores.
                    </li>
<li class="listitem">
                      The top-level tti namespace has become the boost::tti namespace.
                    </li>
<li class="listitem">
                      The macros now start with <code class="computeroutput"><span class="identifier">BOOST_TTI_</span></code>
                      rather than just <code class="computeroutput"><span class="identifier">TTI_</span></code>
                      as previously.
                    </li>
</ul></div>
              </li>
<li class="listitem">
                The variadic macro support works only with the latest version of
                the variadic_macro_library, which is version 1.3+.
              </li>
</ul></div>
        </li></ul></div>
<h4>
<a name="the_type_traits_introspection_library.tti_history.h6"></a>
      <span class="phrase"><a name="the_type_traits_introspection_library.tti_history.version_1_2"></a></span><a class="link" href="tti_history.html#the_type_traits_introspection_library.tti_history.version_1_2">Version
      1.2</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
          Added the set of metafunction class macros for passing the macro metafunctions
          as metadata. This complements passing the macro metafunctions as metadata
          using placeholder expressions.
        </li></ul></div>
<h4>
<a name="the_type_traits_introspection_library.tti_history.h7"></a>
      <span class="phrase"><a name="the_type_traits_introspection_library.tti_history.version_1_1"></a></span><a class="link" href="tti_history.html#the_type_traits_introspection_library.tti_history.version_1_1">Version
      1.1</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          Library now also compiles with gcc 3.4.2 and gcc 3.4.5.
        </li>
<li class="listitem">
          Examples of use have been added to the documentation.
        </li>
<li class="listitem">
          In the documentation the previously mentioned 'nested type metafunctions'
          are now called "nullary type metafunctions'.
        </li>
<li class="listitem">
          <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_TYPE</span></code> and
          <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_has_type</span></code> now have optional typedef
          checking.
        </li>
<li class="listitem">
          New macro metafunction functionality which allows composite typed to be
          treated as individual types has been implemented. These include:
          <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_MEMBER_DATA</span></code>
              </li>
<li class="listitem">
                <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_MEMBER_FUNCTION</span></code>
              </li>
<li class="listitem">
                <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_STATIC_MEMBER_FUNCTION</span></code>
              </li>
</ul></div>
        </li>
<li class="listitem">
          New nullary type metafunction <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_has_static_member_function</span></code>
          uses the new underlying <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_STATIC_MEMBER_FUNCTION</span></code>
          macro metafunction. Its signature uses an optional MPL forward sequence
          for the parameter types and an optional Boost <code class="computeroutput"><span class="identifier">function_types</span></code>
          tag type.
        </li>
<li class="listitem">
          New nullary type metafunctions <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">valid_member_type</span></code>
          and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_valid_member_type</span></code> for checking if
          the 'type' returned from invoking the <code class="computeroutput"><span class="identifier">BOOST_TTI_MEMBER_TYPE</span></code>
          or <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_member_type</span></code> metafunctions is valid.
        </li>
<li class="listitem">
          Breaking changes
          <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_TYPE_CHECK_TYPEDEF</span></code>
                and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_has_type_check_typedef</span></code> have
                been removed, and the functionality in them folded into <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_TYPE</span></code> and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_has_type</span></code>.
              </li>
<li class="listitem">
                BOOST_TTI_MEMBER_TYPE and boost::tti::mf_member_type no longer also
                return a 'valid' boolean constant. Use boost::tti::valid_member_type
                or boost::tti::mf_valid_member_type metafunctions instead ( see above
                ).
              </li>
<li class="listitem">
                <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_has_static_function</span></code> has been
                removed and its functionality moved to <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_has_static_member_function</span></code>
                ( see above ).
              </li>
<li class="listitem">
                <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_member_data</span></code> uses the new underlying
                <code class="computeroutput"><span class="identifier">BOOST_TTI_HAS_MEMBER_DATA</span></code>
                macro metafunction.
              </li>
<li class="listitem">
                The signature for <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">mf_has_member_function</span></code>
                has changed to use an optional MPL forward sequence for the parameter
                types and an optional Boost <code class="computeroutput"><span class="identifier">function_types</span></code>
                tag type.
              </li>
<li class="listitem">
                All nullary type metafunctions take their corresponding macro metafunction
                parameter as a class in the form of a Boost MPL lambda expression
                instead of as a template template parameter as previously. Using
                a placeholder expression is the easiest way to pass the corresponding
                macro metafunction to its nullary type metafunction.
              </li>
</ul></div>
        </li>
</ul></div>
<h4>
<a name="the_type_traits_introspection_library.tti_history.h8"></a>
      <span class="phrase"><a name="the_type_traits_introspection_library.tti_history.version_1_0"></a></span><a class="link" href="tti_history.html#the_type_traits_introspection_library.tti_history.version_1_0">Version
      1.0</a>
    </h4>
<p>
      Initial version of the library.
    </p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2011-2013 Tropic Software
      East Inc<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
</div></td>
</tr></table>
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